Upper extremity TC3

Question 1

What is the rotator cuff?

Answer 1

muscles and tendons that stabilize the shoulder

Question 2

what are the muscles of the rotator cuff?

Answer 2

SITS
supraspinatus
infraspinatus
teres minor
subscapularis

Question 3

what is the path of the suprascapular n and artery in relation to the suprascapular ligament?

Answer 3

The suprascapular notch is converted to a foramen by the superior transverse scapular ligament. This is the route through which structures pass between the base of the neck and the posterior scapular region. The suprascapular nerve passes through the foramen underneath the ligament while the artery travels over the ligament.

Question 4

What muscles are responsible for abducting humerus?

Answer 4

supraspinatus, deltoid, serratus anterior

Question 5

what arteries comprise the anastomotic network around the scapula?

Answer 5

intercostal, dorsal scapular, suprascapular, transverse cervical, circumflex

Question 6

what are the superficial veins?

Answer 6

cephalic, basilic, median cubital, median vein of forearm, perforating veins

Question 7

where do you administer stuff via a venipuncture?

Answer 7

usually median cubital vein

Question 8

what are borders of the axilla?

Answer 8

apex- 1st rib, clavicle, superior edge of subscapularis

base- your armpit- skin

anterior- pec major, minor
posterior- scapula
medial- thoracic wall + serratus anterior
lateral- intertubercular groove of humerus

Question 9

what are the contents of the axilla?

Answer 9

nerves- brachial plexus

vessels- axillary artery and branches, axillary vein and branches, lymph nodes

Question 10

what is the axillary artery a continuation of?

Answer 10

subclavian, beginning at lateral border of 1st rib and ends at inferior border of teres major to become the brachial artery

Question 11

what are the branches of the axillary artery?

Answer 11

superior thoracic, thoracoacromial, lateral thoracic, subscapular, anterior circumflex humeral, posterior circumflex humeral

Question 12

The brachioradialis muscle is a flexor of the forearm. What evidence might suggest that evolutionarily it might’ve functioned as an extensor?

Answer 12

it is in the posterolateral compartment of the forearm and is innervated by the radial nerve, a nerve known to primarily innervate extensor muscles of the forearm

Question 13

where would you take an arterial pulse in the arm?

Answer 13

brachial artery

Question 14

where do you place a stethoscope when taking blood pressure

Answer 14

stethoscope over cubital fossa